17
Rev. C 12-1-00 P/N 38033
Maintenance - Burner Tray Removal
At some time during the life of a heater, you may
need to inspect and repair the parts of the heater that
allows the gas to flow from the gas supply line into
the burners. If the heater won’t fire and you wish to
check these gas controls:
1. Turn off the gas supply.
2. Disconnect the gas union at the heater.
3. Remove the gas pipe installed into the gas
valve.
4. Remove the gas valve holding bracket.
5. Remove the gas valve wires.
6. Disconnect the ignition wire.
7. Slide the burner tray out.
8. You can remove the gas valve if you need to
check the inlet and outlet screens. (You will
have to remove the pilot tubing.)
9. Remove the bracket that holds the burners in
place.
10. Remove each burner and check for any
blockages.
11. Remove the main burner orifices and check for
blockage.
NOTE
If the heater has been off for the winter or has been
installed, but not fired for an extended period of
time, insects will crawl into these orifices and the
pilot orifice and prevent the heater from firing.
12. Remove the pilot orifice and clean it. (Do not
use any sharp object! It will destroy the
designed orifice size!)
NOTE
You can use this procedure if you have to change
fuel-type - natural to propane or vice versa. The
parts needed to convert the MiniMax are: Gas
valve, pilot assembly, main burner orifices
and module.
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